Conjugação do verbo inglês
CAN ROOF

Verbo regular: roof - roofed - roofed

Afirmação

Forma simple	Forma com V-ing
I can roof you can roof he can roof we can roof you can roof they can roof	I can be roofing you can be roofing he can be roofing we can be roofing you can be roofing they can be roofing
Perfeito	Perfeito com V-ing
I can have roofed you can have roofed he can have roofed we can have roofed you can have roofed they can have roofed	I can have been roofing you can have been roofing he can have been roofing we can have been roofing you can have been roofing they can have been roofing

Negação

Forma simple	Forma com V-ing
I can't roof you can't roof he can't roof we can't roof you can't roof they can't roof	I can't be roofing you can't be roofing he can't be roofing we can't be roofing you can't be roofing they can't be roofing
Perfeito	Perfeito com V-ing
I can't have roofed you can't have roofed he can't have roofed we can't have roofed you can't have roofed they can't have roofed	I can't have been roofing you can't have been roofing he can't have been roofing we can't have been roofing you can't have been roofing they can't have been roofing

Forma interrogativa

Forma simple	Forma com V-ing
can I roof? can you roof? can he roof? can we roof? can you roof? can they roof?	can I be roofing? can you be roofing? can he be roofing? can we be roofing? can you be roofing? can they be roofing?
Perfeito	Perfeito com V-ing
can I have roofed? can you have roofed? can he have roofed? can we have roofed? can you have roofed? can they have roofed?	can I have been roofing? can you have been roofing? can he have been roofing? can we have been roofing? can you have been roofing? can they have been roofing?

Forma interro-Negação

Forma simple	Forma com V-ing
can't I roof? can't you roof? can't he roof? can't we roof? can't you roof? can't they roof?	can't I be roofing? can't you be roofing? can't he be roofing? can't we be roofing? can't you be roofing? can't they be roofing?
Perfeito	Perfeito com V-ing
can't I have roofed? can't you have roofed? can't he have roofed? can't we have roofed? can't you have roofed? can't they have roofed?	can't I have been roofing? can't you have been roofing? can't he have been roofing? can't we have been roofing? can't you have been roofing? can't they have been roofing?